REAL GNP IN BILLIONS OF DOLLARS, USA, 1890-1974
   52.7
   55.1
   60.4
   57.5
   55.9
   62.6
   61.3
   67.1
   68.6
   74.8
   76.9
   85.7
   86.5
   90.8
   89.7
   96.3
  107.5
  109.2
  100.2
  116.8
  120.1
  123.2
  130.2
  131.4
  125.6
  124.5
  134.3
  135.2
  151.8
  146.4
  140.0
  127.8
  148.0
  165.9
  165.5
  179.4
  190.0
  189.8
  190.9
  203.6
  183.5
  169.3
  144.2
  141.5
  154.3
  169.5
  193.0
  203.2
  192.9
  209.4
  227.2
  263.7
  297.8
  337.1
  361.3
  355.2
  312.6
  309.9
  323.7
  324.1
  355.3
  383.4
  395.1
  412.8
  407.0
  438.0
  446.1
  452.5
  447.3
  475.9
  487.7
  497.2
  529.8
  551.0
  581.1
  617.8
  658.1
  675.2
  706.6
  725.6
  722.5
  746.3
  792.5
  839.2
  821.1

